Mechanism of Selective Ion Removal in Membrane Capacitive Deionization for Water Softening

• Published in: Environmental science & technology Vol. 53; no. 10; pp. 5797 - 5804
• Main Authors: Wang, Li, Lin, Shihong
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 21.05.2019
• Subjects: Calcium; Calcium ions; Cations; Composition; Correlation analysis; Deionization; Divalent cations; Electrodes; Feed composition; Fluxes; hardness; Hydraulic retention time; Ion exchange; ion-exchange membranes; Membranes; New technology; Organic chemistry; Retention time; Selectivity; Sodium; Water softening; Water treatment

Capacitive deionization (CDI) is an emerging technology capable of selective removal of ions from water. While many studies have reported chemically tailored electrodes for selective ion removal, the selective removal of divalent cations (i.e., hardness) over monovalent cations can simply be achieve...